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Measurement and conceptual modelling of retention of metals (Cu, Pb, Zn) in soils of three grass swales
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
StormTac corporation, Stockholm, Sweden.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0002-4732-7348
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0001-9938-8217
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2019 (English)In: Journal of Hydrology, ISSN 0022-1694, E-ISSN 1879-2707, Vol. 574, p. 1053-1061Article in journal (Refereed) Published
Abstract [en]

Grass swales are important elements of the urban green infrastructure that convey and attenuate urban runoff and improve its quality mostly through stormwater infiltration into, and retention of conveyed pollutants by, swale soils. The retention of metals by grass swales was addressed in this study investigating the enrichment of swale soils by three common traffic-related metals: Cu, Pb and Zn. Three swales of various characteristics (L1, L2, L3) were selected for study and their soils were sampled by coring the top 30 cm and dividing the cores into 5 cm thick layers. Cumulative metal burdens were compared to those modelled by the proprietary StormTac Web model, which estimates annual loads of specific constituents for the given land uses and stormwater treatment. The comparisons of measured (MBm) and simulated (MBs) metal burdens retained by swales showed that the measured values exceed the simulated ones, as described by average ratios MBs/MBm = 0.64, 0.50 and 0.59, for swales L1, L2 and L3, respectively. The measured burdens were calculated after subtracting the native soil metal concentrations, assumed equal to those found in the deepest sampled layer, 25–30 cm below the surface. The results suggest the feasibility of assessing performance of grass swales by modelling metal (Cu, Pb, Zn) retention by swales, however for older facilities considered for rehabilitation, the simulated results should be supplemented by soil chemistry sampling.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 574, p. 1053-1061
Keywords [en]
grass swale, heavy metals, roadside soils, planning–level modelling, metal transport
National Category
Water Engineering
Research subject
Urban Water Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-73936DOI: 10.1016/j.jhydrol.2019.05.002ISI: 000476962800083Scopus ID: 2-s2.0-85066065396OAI: oai:DiVA.org:ltu-73936DiVA, id: diva2:1315723
Note

Validerad;2019;Nivå 2;2019-06-11 (oliekm)

Available from: 2019-05-14 Created: 2019-05-14 Last updated: 2019-08-19Bibliographically approved

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Gavric, SnezanaÖsterlund, HeleneMarsalek, JiriViklander, Maria

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